1208 results about "Dye molecule" patented technology

Fused ring bridge, ring locked dyes that form thermally stable photorfractive compositions. The fused ring bridge structures are pi -conjugated bonds in benzene-, naphthalene- or anthracene-derived fused ring systems that connect donor and acceptor groups. The donor and acceptor groups contribute to a high molecular dipole moment and linear polarizability anisotropy. The polarization characteristics of the dye molecules are stabilized since the bonds in the fused ring bridge are not susceptible to rotation, reducing the opportunity for photoisomerization. The dyes are compatible with polymeric compositions, including thermoplastics. The dyes are electrically neutral but have charge transport, electronic and orientational properties such that upon illumination of a composition containing the dye, the dye facilitates refractive index modulation and a photorefractive effect that can be utilized advantageously in numerous applications such as in optical quality devices and biological imaging.

A material composition including a flexible, polymeric matrix and a reverse-thermochromic colorant is described. When subjected to a heat source, the polymeric material can change color from a pale or neutral color to a darker or more vibrant color of a Delta E (ΔE) change of >3. The reverse-thermochromic colorant exhibits a color change when exposed to a heat source within a period of about 30 seconds, and is observable by an unaided human eye under either natural daylight or ambient artificial normal lighting conditions. One or more different reverse-thermochromic colorants in combination may be incorporated. The polymeric matrix surrounds or encapsulates a solvatochromic dye molecule with a phenolate betaine structure. The polymeric matrix includes a dipole orientating agent that induces said solvatochromic dye to express locally when subjected to a temperature change. Various uses for the composition and articles that incorporate the composition are also described, in addition to a method of indicating the temperature of an object or environmental condition.

A flickerless light source comprising a transparent or semitransparent diffuser, a lightpipe with a patterned surface inside the diffuser, and an LED light source attached to each end of the lightpipe is disclosed. The patterned surface of the lightpipe diffuses or reflects light emitted by the LED light sources and through the lightpipe to provide a light with uniform brightness and intensity. The lightpipe is coated with a thin layer of visible-light transparent material which is doped with organic dye molecules. The organic dye has strong ultraviolet light absorption characteristics. By changing the doping concentration of the dye molecules the coating can become total opaque or semi-transparent to certain wavelengths and selective wavelength conversion is obtained. In this way light color, brightness, and intensity can be varied or controlled.

Apparatus and method for high spatial resolution imaging of a sample's structure, including a diffraction-limited resolution volume with a plurality of dye molecules which can be switched between different states and have a distribution density which is greater than the inverse of the diffraction-limited resolution volume, where at least one state is fluorescing, the fluorescence being collected by an objective lens and imaged on a spatially resolving detector by an optical system. At least one light source provided for emitting a switching radiation and for emitting an excitation radiation. At least one of the light sources is arranged to radiate through the sample, and a switching and / or fluorescence excitation of the dye molecules is carried out. The switching is a photoactivation or a photodeactivation of the dye molecules. A focusing arrangement is provided for switching and / or for excitation to generate a line-like illumination region extending in a direction of illumination.

A method and apparatus are provided for obtaining a sub-resolution spatial information of a sample labeled with at least one type fluorescent label. The sub-resolution spatial information has localization information about the positions of fluorescent molecules of the at least one type fluorescent label in at least one spatial direction. The method acquires localization image data by employing fluorescence localization microscopy. The acquired localization image data is processed to obtain the localization information about the positions of fluorescent molecules of the at least one type fluorescent label in at least one spatial direction. The step of processing includes determining in each of the detected images of the series the positions of the barycenters of the detected fluorescence emission distributions from the single fluorescent molecules of the one or more fluorescent labels in at least one spatial direction.

A broad class of lyotropic liquid crystals of a non-surfactant nature, the so-called lyotropic chromonic liquid crystals (LCLCs), are alignable with the techniques, in particular, LCLCs can be aligned at a surface as one monomolecular layer as a stack of monomolecular layers. The method for monolayer alignment is based on alternate layer-by-layer adsorption of polyions and dyes from aqueous solutions that have liquid crystalline structure. Using this method, one is able to stack alternate monolayers of dye and polyion while controlling the long-range in-plane orientation of the dye molecules within the plane of each layer. The feature of controlling the alignment of LCLCs enables one to create practical devices from them. For example, alignment of multilayered stacks allows one to use the resulting dried LCLC films in optical devices, for example, as internal polarizers, color filters, optical compensators, band-gap filters, and the like.

Water-based ink-jet ink compositions and a method of making them, the compositions being miniemulsions, i.e., an aqueous vehicle containing oil particles with dissolved dye molecules, the oil particles having a diameter below 1 mum.

A broad class of lyotropic liquid crystals of a non-surfactant nature, the so-called lyotropic chromonic liquid crystals (LCLCs), are alignable with the techniques, in particular, LCLCs can be aligned at a surface as one monomolecular layer as a stack of monomolecular layers. The method for monolayer alignment is based on alternate layer-by-layer adsorption of polyions and dyes from aqueous solutions that have liquid crystalline structure. Using this method, one is able to stack alternate monolayers of dye and polyion while controlling the long-range in-plane orientation of the dye molecules within the plane of each layer. The feature of controlling the alignment of LCLCs enables one to create practical devices from them. For example, alignment of multilayered stacks allows one to use the resulting dried LCLC films in optical devices, for example, as internal polarizers, color filters, optical compensators, band-gap filters, and the like.

The invention provides in one aspect a process for preparing a microgel by RAFT polymerizing in the presence of a RAFT chain transfer agent, one or more solvophobic monomers and one or more solvophilic monomers to form one or more block copolymers comprising one or more solvophobic blocks and one or more solvophilic blocks wherein the solvophobic block is insoluble in a dispersing medium and the solvophilic block is soluble in the dispersing medium. The block copolymer is dispersed in the dispersing medium to form micelles, which is then stabilized to form the microgel. The dispersing medium can be aqueous or lipophilic. The method of the present invention also permits one to encapsulate a wide variety of materials, such as pigments, dye molecules, and aluminum flakes used in metallized paints.

The invention discloses a porous silicon dioxide-coated titanium dioxide nanopowder photocatalytic material. In the porous silicon dioxide-coated titanium dioxide nanopowder photocatalytic material, the particle size of titanium dioxide is 30-100nm, the thickness of a silicon dioxide coating layer is 5-15nm, silicon dioxide contains mesopores, and the pore diameter is 2-3nm. The invention also discloses a preparation method of the photocatalytic material. The preparation method is simple, easy to implement and low in production cost, and the obtained powder photocatalytic material can degrade organic and inorganic small-molecule gases and organic fuel rather than macromolecular dyes and has no photocorrosion on a supported organic base.

The invention relates to a device structure of an organic light-emitting diode (OLED), and especially relates to a highly-efficient organic electroluminescent device based on a fluorescence doped luminescent layer. The organic electroluminescent device comprises a transparent substrate, a transparent anode, a cavity transmission layer, a first exciton barrier layer, a luminescent layer, a second exciton barrier layer, an electronic transmission layer, an electronic injecting layer and a metal cathode. The luminescent layer is formed by mixing a main body and a guest body. The main body material is organic small molecules whose energy difference between a first kind single heavy excitation state and a triplet excitation state is quite small. The guest body material is dye molecules with high fluorescence efficiency, like quinacridone derivatives. The highly-efficient organic electroluminescent device based on a fluorescence doped luminescent layer is advantageous in that the external quantum efficiency exceeds 5% of theoretic limit efficiency of a conventional fluorescence device, and the luminescence efficiency of a fluorescent OLED device can be effectively improved; the luminescent device of the invention is high in brightness, low in starting voltage, high in efficiency, and low in efficiency roll-off.

The present invention relates to a series of carbazole derivatives which are used in organic electroluminescent devices as the phosphorescent host materials of the emissive layers. The carbazole derivatives have glass transition temperature of between 70° C. and 220° C. and triplet energy of 2.62 eV or more. The carbazole derivatives comprise two carbazole groups and alkyl group and / or spiro group inserted between the carbazole group and aromatic group, which is represented by formula 1. The carbazole derivatives according to the present invention are used as host materials for the triplet emissive dyes and they have high energy and stability. They can also reduce the converse energy transfer from the dye molecules to the host molecules and improve the luminance and efficiency of the OLEDs, especially the efficiency and lifetime of the blue triplet OLEDs.

Water-fastness in aqueous ink-jet inks containing water-soluble dyes is achieved by using a specific ionic species having a charge opposite to that on the dye molecule. Anionic dyes typically contain sulfonate (or carboxylate) anionic groups. Using at least one specific ionic species of opposite charge, specifically, phosphonium salts, causes the colorant components to "crash" or precipitate out of the water-based ink onto the print medium due to the formation of a suitable charge complex between the ionic parts of the dye and the opposite charge of the counter-ion species. Other positively charged salts, such as quaternary ammonium salts, carbonium salts, iodonium salts, sulfonium salts, and pyrillium salts may be used to improve aqueous dispersion stability and thus printability. Such additional cationic salt partially replaces the phosphonium salt(s). Alternatively, certain surfactants, such as aromatic ethoxylates, polyethylene oxide ethers, or polypropylene oxide ethers may be used to improve print quality.

A polymeric sensing membrane having a Stern-Volmer constant within a pre-determined range of Stern-Volmer constants. The membrane includes a polymeric material having a fluorescent dye molecule dispersed therein. The dye molecule is capable of having its fluorescence collisionally quenched by a gas to be detected by the membrane. In one embodiment, the membrane includes a fluorescent dye molecule which has a relaxation time and a polymeric material having a permeability within a range of permeabilities defined by a mathematical function of the pre-determined range of Stern-Volmer constants. In another embodiment, the membrane includes a polymeric having a permeability and a fluorescent dye molecule having a relaxation time within a range of relaxation times defined by a mathematical function of the pre-determined range of Stern-Volmer constants.

The invention provides an organic dye which uses five-membered heterocyclic ring, derivatives thereof and a dye-sensitized solar cell prepared by the organic dye. The dye uses the five-membered heterocyclic ring or the derivatives thereof as a Pi unit, uses substituted triarylamine as an electron donor, uses cyanoacetic acid structure as an electron acceptor, and belongs to molecule of D-Pi-A structure. The dye molecule belongs to pure organic compounds, the structure of the materials is simple and is easy to be obtained; expensive materials of metal of Ru and purifying agent of polydextrose do not need to use, the compound yield is higher, so the total yield is between 40 percent and 70 percent; besides, the performance of spectral absorption and molar extinction coefficient and the like of the dye are excellent; and the peak value of the spectral absorption is over 550nm at the most, the molar extinction coefficient is over 48000M<-1>cm<-1>, the peak value and the coefficient are more than the Ru dye, therefore, the dye has wider absorption range to the sunlight. The dye-sensitized solar cell prepared by the organic dye has the maximum of quantum conversion efficiency of 97 percent and the highest photoelectric conversion efficiency of more than 8.0 percent.

The invention provides in one aspect a process for preparing a microgel by RAFT polymerizing in the presence of a RAFT chain transfer agent, one or more solvophobic monomers and one or more solvophilic monomers to form one or more block copolymers comprising one or more solvophobic blocks and one or more solvophilic blocks wherein the solvophobic block is insoluble in a dispersing medium and the solvophilic block is soluble in the dispersing medium. The block copolymer is dispersed in the dispersing medium to form micelles, which is then stabilized to form the microgel. The dispersing medium can be aqueous or lipophilic. The method of the present invention also permits one to encapsulate a wide variety of materials, such as pigments, dye molecules, and aluminum flakes used in metallized paints.

The invention discloses a click chemistry based metal-organic framework cross-linking membrane and a preparation method and application thereof.Polymerizable double bonds are introduced into MOFs (metal-organic frameworks) through a post-synthetic modification method, and the chemical cross-linking type MOF membrane is prepared in situ by thiol-ene click reaction, so that a novel rapid efficient solvent-free method mild in conditions is provided for MOFs membrane synthesis.By means of applying the strategy, an obtained independent homogeneous MOFs hybrid membrane material is excellent in membrane forming performance and toughness, and the defects of agglomeration of MOFs crystals and poor compatibility between the MOFs and polymers are overcome.The synthesized MOFs membrane material is excellent in selective separation effect on dye molecules in water and has a promising application prospect in the field of membrane separation.

The invention belongs to the technical field of metal organic framework materials, and discloses a zinc and copper bi-metal organic framework material and a preparation method and application thereof. The preparation method comprises the steps that 1, soluble copper salt, soluble zinc salt and trimesic acid are added to mixed solvent of N,N'-dimethyl formamide, water and ethyl alcohol, even stirring and ultrasonic treatment are conducted, and reaction liquid is obtained; 2, the reaction liquid obtained in the first step is transferred into a polytef reaction kettle for a hydrothermal reaction, and a roughly prepared zinc and copper bi-metal organic framework material is obtained; 3, the material obtained in the second step is washed through the N,N'-dimethyl formamide firstly and then soaked through ethyl alcohol solvent, and the purified zinc and copper bi-metal organic framework material is obtained after activation is conducted. According to the zinc and copper bi-metal organic framework material, the framework structure of an original copper-based organic material is reserved; meanwhile, the prepared material is large in specific surface and developed in micro-pore structure and has higher adsorption capacity to low-concentration congo red dye molecules in water.

The invention discloses a method for adsorption and removal of heavy metals and dye of waste water by garlic waste. The method provided by the invention comprises the following steps of washing a certain amount of garlic waste by water; mixing the washed garlic waste, one or more alkalis and water by stirring for 12 to 24 hours according to a mass ratio of 1: (0.05 to 0.2): (0.5 to 2) for a reaction, filtering to obtain a solid product, washing the solid product by water until the solid product has a pH value of 7, feeding the washed solid product into a vacuum baking oven, drying at a temperature of 60 to 120 DEG C, carrying out fragmentation and screening, collecting particles below 40 meshes, wherein the particles below 40 meshes are utilized as adsorbents, preparing a heavy metal ion or dye molecule aqueous solution having concentration of 0.1 to 10mmol / L, adding a certain amount of the adsorbents into the heavy metal ion or dye molecule aqueous solution according to a volume ratio of 0.5 to 10g / L, and shaking the mixed solution obtained by the previous step at a room temperature for 0.5 to 24 hours so that the adsorbents can fully adsorb heavy metal ions or dye molecules of the heavy metal ion or dye molecule aqueous solution. The method provided by the invention has a reasonable design and simple processes, realizes obvious effects, greatly reduces a treatment cost, wherein the treatment cost of the method is 10 to 15% of that of the traditional treatment method, greatly shortens a treatment period, does not produce secondary pollution after adsorption treatment, andcan be operated and popularized easily.

The invention discloses a method for preparing biomass activated carbon through vacuum freeze drying. The method comprises the following steps: performing steps of raw material crushing, acid treatment, activation soaking, freeze drying, high-temperature activation, acid pickling and the like, performing hydrothermal reaction on biomass raw materials with an acid solution, and further performing freeze drying treatment, thereby obtaining the biomass activated carbon. Compared with the prior art, the method has the advantages that the raw materials are rich and cheap, and rural wastes can be reused; by using a hydrothermal treatment technique in an acid environment, a part of substances in the biomass raw materials can be reduced, and porous loosened structures of the biomass raw materials are maintained; by using a vacuum freeze drying technique, original porous flurry structures of the biomass raw materials can be maintained to the maximum extent, the specific surface area of a product can be increased, and pore structures can be enriched; the biomass activated carbon prepared by using the scheme of the invention is high in specific surface area, rich in pore structure and excellent in synergic adsorption property of water body dye molecules and heavy metal ions, and has significant industrial application values.

The invention is applied to the fields of optics, biology, chemistry and the like and provides a super resolution fluorescence lifetime imaging method. The method comprises the following steps of: sparsely activating an optical switch dye molecule marked in a sample; exciting the activated optical switch dye molecule in the sample; collecting photons transmitted by the activated optical switch dye molecule and recording a fluorescent image of the optical switch dye molecule; carrying out the centroid positioning on the optical switch dye molecule in the fluorescent image; counting the photons received at the centroid positioning site and determining a fluorescence lifetime of the activated optical switch dye molecule; and constructing the super resolution fluorescence lifetime image by combining the centroid positioning result with the fluorescence lifetime of the obtained optical switch dye molecule. By combining the super resolution fluorescence microtechnique based on unimolecule positioning with the fluorescence lifetime imaging based on time relevant single photon counting, the invention realizes the super resolution fluorescence lifetime imaging, breaks through the traditional optical diffraction limit and has higher scientific significance and application value.

A flickerless light source comprising a transparent or semitransparent diffuser, a lightpipe with a patterned surface inside the diffuser, and an LED light source attached to each end of the lightpipe is disclosed. The patterned surface of the lightpipe diffuses or reflects light emitted by the LED light sources and through the lightpipe to provide a light with uniform brightness and intensity. The lightpipe is coated with a thin layer of visible-light transparent material which is doped with organic dye molecules. The organic dye has strong ultraviolet light absorption characteristics. By changing the doping concentration of the dye molecules the coating can become total opaque or semi-transparent to certain wavelengths and selective wavelength conversion is obtained. In this way light color, brightness, and intensity can be varied or controlled.

The invention discloses a dye auto-polymerized thin film random laser. The dye auto-polymerized thin film random laser comprises external pump light and a thin film sample, wherein the thin film sample consists of a glass negative and a PDMS thin film; the glass negative and the PDMS thin film together form a leakage waveguide structure; and the PDMS thin film contains an auto-aggregated dye micro-nano crystal which is formed by auto aggregation of PM597 dye molecules. The invention furthermore discloses a preparation method of the dye auto-polymerized thin film random laser. According to the dye auto-polymerized thin film random laser, the low-concentration dye molecules are low in energy of self-absorption loss, so that the threshold value of the random laser is reduced and then the energy loss of the pump light is reduced; the solubility of the dye molecules change and the dye molecules aggregate to form the micro-nano crystal which serves as a scattering medium and a gain medium in a random laser outgoing process, so that the preparation method of the random laser is simplified; and the thin film random laser is low in threshold value and simple in preparation process.

The invention provides a silica-graphene composite and a preparation method thereof, and a treatment method for removing dye pollutants in water. The silica-graphene composite has laminated graphene flake structures, and silica is loaded on the laminated graphene flake structures. The silica-graphene composite has advantages of a high specific surface area, good dispersity and good hydrophilicity. Since the silica-graphene composite is a porous laminated structure, and the pi conjugate structure of graphene strongly interacts with pi functional groups in dye molecules, the dye adsorption efficiency of the silica-graphene composite is improved, and thus, the composite exerts good adsorption effect on dye pollutants in water. The composite also has the characteristics of a fast dye pollutant removal rate, great adsorption capability and stable adsorption.

The invention discloses a MOF (metal-organic framework) and polyurethane crosslinked membrane as well as a preparation method and an application thereof. Post-synthesis modification is performed on active amino or hydroxyl on MOFs through a polyurethane prepolymer, nanocrystals of the MOFs are linked under the covalent bond function of active amino or hydroxyl and polyurethane prepolymer, so that the compatibility and the acting force between the MOFs particles and a polymer chain are improved, modified MOFs derivatives are endowed with excellent flexibility and a film-forming property, and a new method for preparing MOFs membrane devices is established. The synthesized MOFs membrane material has good selective separation effect on dye molecules in water and has great application prospects in the membrane separation field.

The present disclosure relates to compounds that are useful as near-infrared fluorescence probes, wherein the compounds include i) a pteroyl ligand that binds to a target receptor protein, ii) a dye molecule, and iii) a linker molecule that comprises an amino acid or derivative thereof. The disclosure further describes methods and compositions for making and using the compounds, methods incorporating the compounds, and kits incorporating the compounds.

The invention belongs to the field of nano material preparation and provides a method to achieve surface-common-enhanced fluorescence and surface-enhanced Raman in a core-shell structure. Spherical silver nano particles are used as substrates of surface-common-enhanced fluorescence and surface-enhanced Raman, the silver nano particles are placed inside the shell layers, with good surface-enhanced Raman activity, of gold nano particles, fluorescent dye molecules are disposed between the silver nano particles and the gold nano particles, and the distances among the silver nano particles, the fluorescent dye molecules and the gold nano particles to achieve surface-common-enhanced fluorescence and surface-enhanced Raman in the core-shell structure. A Stober method is used to change corresponding experiment parameters, silicon dioxide of different thicknesses is wrapped on the surfaces of the silver nano particles to adjusting the distances among the silver nano particles, the fluorescent dye molecules and the gold nano particles, surface-common-enhanced fluorescence and surface-enhanced Raman signals of the manufactured multi-layer core-shell structure composite particles are further enhanced, and the multi-layer core-shell structure composite particles are good in water solubility, uniform and stable in nature, and promising in potential application prospect in fields such as biological imaging, safety detection and catalyzing. The method is wide in raw material source, simple and easy to operate, easy in batch and large-scale production, good in industrial production foundation, and promising in application prospect.

The present invention provides organically modified silica (ORMOSIL) nanoparticles into which have been incorporated two-photon absorption dye molecules. The two photon absorption dye displays a unique aggregation induced fluorescence enhancement behavior. As a result ORMOSIL nanoparticles with high amounts of the dye can be prepared. These particles can be used for imaging. In one embodiment, the nanoparticles can additionally have incorporated therein a photosensitizer. The photosensitzer can be activated by intraparticle fluorescence resonance energy transfer (FRET) from the dye aggregates resulting in enhanced fluorescence and singlet oxygen generation from photosensitizer under two-photon excitation conditions. Such nanoparticles can be used for photodynamic therapy applications.

Polymerizable light absorbing azo dyes are disclosed useful as monomers in the formation of devices such as, but not limited to ocular lenses. Specifically, intraocular lenses (IOL) are disclosed wherein one or more of the light absorbing dye is covalently bonded to other structural polymers though ethylene unsaturated groups. The resulting IOLs possess light absorbing properties without significant amounts of free (un-bound) azo dye molecules present in the final structural polymer matrix.

The invention relates to a preparation method of a two-dimensional titanium carbide (Ti3AlC2) adsorbing material and belongs to the field of material preparation. Ternary lamellar compound Ti3AlC2 ceramic powder is soaked with a hydrofluoric acid solution to react for a period of time, and therefore a two-dimensional titanium carbide material is prepared; then the material is soaked with an alkaline solution, the materials are heated and stirred, the materials are cleaned, centrifuged and dried, and the alkalized two-dimensional titanium carbide adsorbing material is prepared. The preparation method is easy and convenient to use, and the target material can be rapidly prepared. The prepared two-dimensional titanium carbide adsorbing material is mainly used for removing dye molecules, heavy metal ions and other pollutants in sewage.